It's torment, really. From her first line to the end, Loona did nothing but irritate me. Not even in the "you're SUPPOSED to hate her!" kind of way. She's just such an absolute nothing, one-note character. Her entire shtick is "I'm a bitch, deal with it," but with no other redeeming character traits to make her fun. But because she's moderately attractive, AND a furry, she becomes the center of attention. So much of the pilot was wasted on this complete fucking waste of a character, while poor Millie sat there barely doing or saying anything.
And the worst part is, even though I'm almost certain the pilot would have been exponentially improved by Loona's absence, I feel like the it wouldn't be as popular if it weren't for her existing.